Horse racing tips September 13: Horses you must back at Chester, Doncaster and Sandown | Racing | Sport

On their recent clash, in last month’s Lonsdale Cup at York, Stradivarius gave his old sparring partner a thumping.

Today Dee Ex Bee is 2lb better off for that length and quarter slamming but that will not be enough to the turn the tables on his old adversary.

The progressive ALLIGATOR ALLEY (3.45, treble) can successfully step up from Listed to Group company by taking the Flying Childers Stakes.

He slammed his rivals at York last month after looking an unlucky runner up on his previous run behind the smart Liberty Beach in a Group 3 at Goodwood in July.

MOLATHAM (4.20, nap) can justify his Group 1 entries by taking the EBF Stakes.

Before he won on his latest start at Yarmouth, he finished an excellent second behind Mums Tipple, considered one the season’s best juveniles, at Ascot when beaten a neck.

At Sandown CASANOVA (3.55, nb) can continue his upward curve since his gelding operation. He showed the benefits of the snip when bolting up at Wolverhampton last month.

CHESTER

1.50 Breathalyze

2.25 Powertrain

3.00 Viking Prince

3.30 Sir Maximilan

4.05 Two Bids

4.40 Hereby

5.15 Salam Zayed

DONCASTER

2.10 Mot Juste

2.40 Saroog

3.10 Stradivarius

3.45 Alligator Alley (treble)

4.20 Molatham (nap)

4.55 Maori Knight

5.30 Flavius Titus

6.00 Sandret

SANDOWN

2.20 Spreadsheet

2.50 Indian Raj

3.20 Miss Yoda

3.55 Casanova (nb)

4.30 Tukhoom

5.05 Kitcarina

5.35 Skyman

SALISBURY

4.35 Red Missile

5.10 Elegant Erin

5.40 Love Powerful

6.10 Mrs Worthington

6.40 Weekender

7.10 Good Tidings